问答题

下列说法中正确的说法个数是（）

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单项选择题

Regarding to the streamlines, which statement as follows is right?
A、The streamline is the movement track of a point charge in the electric field.
B、The tangent direction of each point on the streamline is the direction of at that point.
C、The potential of two different points on the same streamline may be equal.
D、The streamline is a curve that describes the intensity of electric field at each point in the field.